Re: [Qemu-devel] [PATCH v4 3/5] spapr: Implement H_CONFER

2019-07-16 Thread David Gibson
On Tue, Jul 16, 2019 at 08:25:28PM +1000, Nicholas Piggin wrote: > David Gibson's on July 16, 2019 6:25 pm: > > On Tue, Jul 16, 2019 at 12:47:24PM +1000, Nicholas Piggin wrote: > >> This does not do directed yielding and is not quite as strict as PAPR > >> specifies in terms of precise dispatch beh

Re: [Qemu-devel] [PATCH v4 3/5] spapr: Implement H_CONFER

2019-07-16 Thread Nicholas Piggin
David Gibson's on July 16, 2019 6:25 pm: > On Tue, Jul 16, 2019 at 12:47:24PM +1000, Nicholas Piggin wrote: >> This does not do directed yielding and is not quite as strict as PAPR >> specifies in terms of precise dispatch behaviour. This generally will >> mean suboptimal performance, rather than g

Re: [Qemu-devel] [PATCH v4 3/5] spapr: Implement H_CONFER

2019-07-16 Thread David Gibson
On Tue, Jul 16, 2019 at 12:47:24PM +1000, Nicholas Piggin wrote: > This does not do directed yielding and is not quite as strict as PAPR > specifies in terms of precise dispatch behaviour. This generally will > mean suboptimal performance, rather than guest misbehaviour. Linux > does not rely on ex